Table 1.

The B.E.T. approximation with y = 10³, z = 2 × 10⁵

xy	N̄ex (exact)	xB′/2 (exact)	Eq. 36 (B.E.T.)
0.1	1.063	1.063	1.063
0.2	1.225	1.225	1.225
0.4	1.650	1.652	1.654
0.6	2.468	2.477	2.492
0.8	4.733	4.824	4.994
0.9	8.025	8.641	9.994
1.0	8.153	16.309	∞